Here is the full list of all 30 Audica achievements.
5-Star all songs on Expert.
Finish Campaign on Expert.
Friends Leaderboard contains at least 10 friends.
5-Star all songs on Beginner (or above).
5-Star all songs on Standard (or above).
5-Star all songs on Advanced (or above).
Finish Campaign on Beginner (or above).
Finish Campaign on Standard (or above).
Finish Campaign on Advanced (or above).
Beat a song with Mirror Mode enabled.
Complete the Advanced Tutorial.
Complete the Basics Tutorial.
Finish a song with an Average Aim Offset and Spread of under 1.5 degrees on both hands.
Achieve Perfect Timing and Perfect Aim requirements together on a single run.
Beat a song with aim-assist at 50% or lower.
Finish a song with an Average Timing Offset of less than 5ms.
Use the gun spinning feature while maintaining a streak.
Use the gun throwing feature while maintaining a streak.
Gold Star all songs on Expert.